/* ============================================================
   STABLECOIN STACK — MkDocs Material Custom Theme
   Brand: Fabric Payment Standards Foundation
   ============================================================ */

/* ------ Google Font Import ------ */
@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&family=DM+Serif+Display:ital@0;1&family=JetBrains+Mono:wght@400;500&display=swap');

/* ------ Brand Colour Tokens ------ */
[data-md-color-scheme="default"] {
  --md-primary-fg-color:        #0B1F33;
  --md-primary-fg-color--light: #1F4060;
  --md-primary-fg-color--dark:  #060E17;
  --md-primary-bg-color:        #FFFFFF;

  --md-accent-fg-color:         #1F6AE1;
  --md-accent-fg-color--transparent: rgba(31,106,225,0.12);

  /* Custom brand tokens */
  --ss-navy:          #0B1F33;
  --ss-blue:          #1F6AE1;
  --ss-blue-light:    #EBF2FD;
  --ss-green:         #2E7D32;
  --ss-green-light:   #EBF5EB;
  --ss-amber:         #C58A00;
  --ss-amber-light:   #FDF8E5;
  --ss-graphite:      #2B2B2B;
  --ss-mid:           #6B7280;
  --ss-border:        rgba(11,31,51,0.10);
  --ss-surface:       #F5F7F9;
  --ss-white:         #FFFFFF;

  /* Override MD defaults */
  --md-default-bg-color:        #FFFFFF;
  --md-default-fg-color:        #2B2B2B;
  --md-default-fg-color--light: #6B7280;
  --md-typeset-color:           #2B2B2B;

  --md-code-bg-color:           #F0F4F8;
  --md-code-fg-color:           #0B1F33;
}

[data-md-color-scheme="slate"] {
  --md-primary-fg-color:        #1E3A5F;
  --md-primary-fg-color--light: #2A4F7A;
  --md-primary-fg-color--dark:  #0B1F33;
  --md-primary-bg-color:        #FFFFFF;

  --md-accent-fg-color:         #4D90F0;
  --md-accent-fg-color--transparent: rgba(77,144,240,0.15);

  --ss-navy:          #CBD5E1;
  --ss-blue:          #4D90F0;
  --ss-blue-light:    rgba(77,144,240,0.12);
  --ss-green:         #4CAF50;
  --ss-green-light:   rgba(76,175,80,0.12);
  --ss-amber:         #FFB300;
  --ss-amber-light:   rgba(255,179,0,0.12);
  --ss-graphite:      #E2E8F0;
  --ss-mid:           #94A3B8;
  --ss-border:        rgba(255,255,255,0.08);
  --ss-surface:       #1A2640;
  --ss-white:         #FFFFFF;

  --md-default-bg-color:        #0F1E30;
  --md-default-fg-color:        #E2E8F0;
  --md-code-bg-color:           #1A2640;
}

/* ------ Typography ------ */
.md-typeset {
  font-size: 1rem;
  line-height: 1.75;
  font-family: 'DM Sans', sans-serif;
}

.md-typeset h1 {
  font-family: 'DM Serif Display', serif;
  font-size: 2.6rem;
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--ss-navy);
  margin-bottom: 1rem;
}

.md-typeset h2 {
  font-family: 'DM Serif Display', serif;
  font-size: 1.8rem;
  font-weight: 400;
  letter-spacing: -0.01em;
  color: var(--ss-navy);
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
}

.md-typeset h3 {
  font-family: 'DM Sans', sans-serif;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--ss-navy);
  margin-top: 2rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

[data-md-color-scheme="slate"] .md-typeset h1,
[data-md-color-scheme="slate"] .md-typeset h2,
[data-md-color-scheme="slate"] .md-typeset h3 {
  color: var(--ss-navy);
}

.md-typeset strong {
  color: var(--ss-navy);
  font-weight: 600;
}

[data-md-color-scheme="slate"] .md-typeset strong {
  color: #E2E8F0;
}

/* ------ Header / Navbar ------ */
.md-header {
  border-bottom: 1px solid var(--ss-border);
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

.md-header__title {
  font-family: 'DM Sans', sans-serif;
  font-weight: 600;
  letter-spacing: -0.01em;
  font-size: 1.05rem;
}

.md-tabs__link {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  opacity: 0.75;
  transition: opacity 0.2s;
}

.md-tabs__link:hover,
.md-tabs__link--active {
  opacity: 1;
}

/* ------ Hero / Announcement Banner ------ */
.md-banner {
  background: linear-gradient(90deg, var(--ss-blue) 0%, #1252B0 100%);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.03em;
}

/* ------ Navigation Sidebar ------ */
.md-nav__title {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ss-mid);
}

.md-nav__link {
  font-size: 0.875rem;
  font-weight: 400;
  transition: color 0.2s;
}

.md-nav__link--active {
  font-weight: 600;
  color: var(--ss-blue);
}

/* ------ Hero Cards (grid-based layout helpers) ------ */

/* Full-bleed hero section on home */
.ss-hero {
  background: linear-gradient(135deg, var(--ss-navy) 0%, #112A45 60%, #0B3060 100%);
  padding: 5rem 0 4rem;
  margin: -1.2rem calc(-1 * var(--md-typeset-margin)) 2.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.ss-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 110%, rgba(31,106,225,0.25) 0%, transparent 70%);
}

.ss-hero > * { position: relative; }

.ss-hero h1 {
  color: #FFFFFF !important;
  font-size: 3.2rem !important;
  max-width: 820px;
  margin: 0 auto 1.25rem;
  line-height: 1.15 !important;
}

.ss-hero p.lead {
  color: rgba(255,255,255,0.82) !important;
  font-size: 1.2rem;
  max-width: 640px;
  margin: 0 auto 2rem;
  line-height: 1.7;
}

.ss-hero .md-button {
  margin: 0.3rem;
}

/* Kicker label above headlines */
.ss-kicker {
  display: inline-block;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ss-blue);
  background: var(--ss-blue-light);
  padding: 0.3em 0.85em;
  border-radius: 100px;
  margin-bottom: 1rem;
}

[data-md-color-scheme="slate"] .ss-kicker {
  color: #7AB4FF;
  background: rgba(77,144,240,0.15);
}

/* Metric / stat cards */
.ss-stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(175px, 1fr));
  gap: 1.5rem;
  margin: 2.5rem 0;
}

.ss-stat {
  background: var(--ss-surface);
  border-radius: 12px;
  padding: 1.75rem 1.5rem;
  text-align: center;
  border: 1px solid var(--ss-border);
  transition: transform 0.2s, box-shadow 0.2s;
}

.ss-stat:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}

.ss-stat .ss-stat__number {
  display: block;
  font-family: 'DM Serif Display', serif;
  font-size: 2.6rem;
  color: var(--ss-blue);
  line-height: 1;
  margin-bottom: 0.4rem;
}

.ss-stat .ss-stat__label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ss-mid);
}

/* Audience card rows */
.ss-audience-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.ss-audience-card {
  background: var(--ss-surface);
  border-radius: 14px;
  padding: 2rem;
  border: 1px solid var(--ss-border);
  border-top: 4px solid var(--ss-blue);
  transition: transform 0.25s, box-shadow 0.25s;
}

.ss-audience-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.09);
}

.ss-audience-card--green  { border-top-color: var(--ss-green); }
.ss-audience-card--amber  { border-top-color: var(--ss-amber); }
.ss-audience-card--navy   { border-top-color: var(--ss-navy); }

.ss-audience-card .ss-card__icon {
  font-size: 2.2rem;
  margin-bottom: 1rem;
  display: block;
}

.ss-audience-card h3 {
  margin-top: 0 !important;
  font-size: 1rem !important;
  letter-spacing: 0 !important;
  text-transform: none !important;
  color: var(--ss-navy);
}

.ss-audience-card p {
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--ss-graphite);
  margin-bottom: 1rem;
}

.ss-audience-card a {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--ss-blue);
  text-decoration: none;
  letter-spacing: 0.03em;
}

.ss-audience-card a::after { content: ' →'; }

/* Feature / advantage rows */
.ss-feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin: 1.5rem 0;
}

@media (max-width: 768px) {
  .ss-feature-row { grid-template-columns: 1fr; }
  .ss-hero h1 { font-size: 2rem !important; }
  .ss-stat-grid { grid-template-columns: 1fr 1fr; }
}

.ss-feature {
  display: flex;
  gap: 1rem;
  padding: 1.5rem;
  background: var(--ss-surface);
  border-radius: 12px;
  border: 1px solid var(--ss-border);
  align-items: flex-start;
}

.ss-feature__icon {
  font-size: 1.8rem;
  flex-shrink: 0;
  margin-top: 0.1rem;
}

.ss-feature__body h4 {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ss-navy);
  margin: 0 0 0.35rem;
}

.ss-feature__body p {
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--ss-mid);
  margin: 0;
}

[data-md-color-scheme="slate"] .ss-feature__body h4 { color: #CBD5E1; }
[data-md-color-scheme="slate"] .ss-feature__body p  { color: #94A3B8; }

/* Comparison table override */
.ss-compare table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.ss-compare th {
  background: var(--ss-navy);
  color: #FFFFFF;
  font-weight: 600;
  padding: 0.75rem 1rem;
  text-align: left;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

[data-md-color-scheme="slate"] .ss-compare th {
  background: #1E3A5F;
}

.ss-compare td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--ss-border);
  vertical-align: middle;
}

.ss-compare td:first-child {
  font-weight: 500;
}

.ss-check   { color: var(--ss-green); font-weight: 700; }
.ss-cross   { color: #DC2626;         font-weight: 700; }
.ss-partial { color: var(--ss-amber); font-weight: 700; }

/* Business model cards */
.ss-model-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.ss-model-card {
  background: var(--ss-white);
  border-radius: 14px;
  padding: 2rem;
  border: 1px solid var(--ss-border);
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
  transition: box-shadow 0.25s, transform 0.25s;
}

[data-md-color-scheme="slate"] .ss-model-card {
  background: var(--ss-surface);
}

.ss-model-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0,0,0,0.10);
}

.ss-model-card .ss-tag {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ss-blue);
  background: var(--ss-blue-light);
  padding: 0.25em 0.7em;
  border-radius: 100px;
  display: inline-block;
  margin-bottom: 0.85rem;
}

.ss-model-card h3 {
  font-family: 'DM Serif Display', serif;
  font-size: 1.25rem !important;
  font-weight: 400 !important;
  letter-spacing: 0 !important;
  text-transform: none !important;
  color: var(--ss-navy);
  margin: 0 0 0.75rem !important;
}

[data-md-color-scheme="slate"] .ss-model-card h3 { color: #CBD5E1; }

.ss-model-card p {
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--ss-mid);
  margin-bottom: 1.25rem;
}

.ss-model-card .ss-revenue {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ss-green);
  letter-spacing: 0.02em;
}

.ss-model-card .ss-revenue::before { content: '↗ '; }

/* Architecture / flow diagram wrapper */
.ss-flow {
  background: var(--ss-surface);
  border-radius: 16px;
  padding: 2.5rem;
  border: 1px solid var(--ss-border);
  margin: 2rem 0;
}

.ss-flow .mermaid {
  text-align: center;
}

/* Callout overrides — richer look */
.md-typeset .admonition,
.md-typeset details {
  border-radius: 10px;
  border-left-width: 4px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.md-typeset .admonition-title,
.md-typeset summary {
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
}

/* Quote / pull-quote */
.md-typeset blockquote {
  border-left: 4px solid var(--ss-blue);
  background: var(--ss-blue-light);
  border-radius: 0 10px 10px 0;
  padding: 1.25rem 1.5rem;
  font-size: 1.05rem;
  font-style: italic;
  color: var(--ss-navy);
}

[data-md-color-scheme="slate"] .md-typeset blockquote {
  background: rgba(77,144,240,0.10);
  color: #CBD5E1;
}

/* Foundation badge */
.ss-foundation-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ss-mid);
  border: 1px solid var(--ss-border);
  border-radius: 100px;
  padding: 0.3em 0.9em;
  text-transform: uppercase;
}

/* CTA strip */
.ss-cta-strip {
  background: linear-gradient(135deg, var(--ss-navy) 0%, #112A45 100%);
  border-radius: 16px;
  padding: 3rem 2.5rem;
  text-align: center;
  margin: 3rem 0;
  position: relative;
  overflow: hidden;
}

.ss-cta-strip::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 80% at 50% 120%, rgba(31,106,225,0.3) 0%, transparent 70%);
}

.ss-cta-strip > * { position: relative; }

.ss-cta-strip h2 {
  color: #FFFFFF !important;
  font-size: 2rem !important;
  margin-bottom: 0.75rem !important;
}

.ss-cta-strip p {
  color: rgba(255,255,255,0.75) !important;
  font-size: 1.05rem;
  margin-bottom: 1.75rem;
}

.ss-cta-strip .md-button {
  margin: 0.25rem;
}

/* Button overrides */
.md-typeset .md-button {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  border-radius: 8px;
  padding: 0.65em 1.6em;
  transition: all 0.2s;
}

.md-typeset .md-button--primary {
  background: var(--ss-blue);
  border-color: var(--ss-blue);
  color: #FFFFFF;
}

.md-typeset .md-button--primary:hover {
  background: #1756ba;
  border-color: #1756ba;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(31,106,225,0.35);
}

/* Tags */
.md-tag {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.05em;
}

/* Footer */
.md-footer {
  border-top: 1px solid var(--ss-border);
}

.md-footer-meta {
  font-size: 0.78rem;
}

/* Horizontal rule styled */
.md-typeset hr {
  border: none;
  border-top: 1px solid var(--ss-border);
  margin: 2.5rem 0;
}

/* Step list helper — numbered steps with styling */
.ss-steps {
  list-style: none;
  padding: 0;
  margin: 2rem 0;
  counter-reset: ss-step;
}

.ss-steps li {
  counter-increment: ss-step;
  display: flex;
  gap: 1.25rem;
  padding: 1.5rem;
  margin-bottom: 1rem;
  background: var(--ss-surface);
  border-radius: 12px;
  border: 1px solid var(--ss-border);
  align-items: flex-start;
}

.ss-steps li::before {
  content: counter(ss-step);
  flex-shrink: 0;
  width: 2rem;
  height: 2rem;
  background: var(--ss-blue);
  color: #FFFFFF;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  margin-top: 0.05rem;
}

/* TOC */
.md-nav--secondary .md-nav__title {
  font-size: 0.68rem;
}

/* Print */
@media print {
  .md-header, .md-sidebar, .md-footer, .md-tabs { display: none !important; }
  .md-main__inner { margin: 0; }
  .md-typeset h1 { font-size: 2rem; }
}